Analytical solutions to eddy current in carbon fiber-reinforced composites induced by line current. (3rd July 2016)

• Record Type: Journal Article
• Authors: Mizukami, Koichi; Mizutani, Yoshihiro; Todoroki, Akira; Suzuki, Yoshiro
• Is Part Of: Advanced composite materials. Volume 25:Number 4(2016)
• Page Start: 385
• Page End: 401
• Publication Date: 2016-07-03
• Subjects: carbon fiber composites -- eddy current -- analytical solution -- anisotropy -- skin effect; Composite materials -- Periodicals; Reinforced plastics -- Periodicals; Electronic journals; 620.11805
• DOI: 10.1080/09243046.2015.1052132
• Languages: English
• ISSNs: 0924-3046

Abstract

Abstract : This paper presents analytical solutions to eddy current distribution in carbon fiber-reinforced plastics induced by line current. Derived solutions show that eddy current distribution in unidirectional carbon fiber composite is dependent only on electrical conductivity in the drive current direction when the drive current is directed in the fiber direction or the transverse direction. Moreover, according to the derived analytical solution, skin depth of eddy current depends not only on frequency of drive current but on lift-off and width of the drive current unlike general expression of skin depth. Finally, we discuss improvement of sensitivity of eddy current conductivity sensor using analytical solutions. It is found that analytical solutions can clearly divide effects of magnetic field from drive current and that from eddy current. Sensitivity of eddy current sensor can be improved by 10 times placing pickup coil at region where the effect of magnetic field from eddy current is large.